使用 Mockito 验证是否使用包含子字符串的参数调用了方法

Question

当调用logger.error时，有许多不同的东西可以作为第三个参数传递。

如何验证e是否包含特定的子字符串？

这是我的生产代码..

public class MyClass {
    private ILogger logger = Slf4jLogbackLogger
            .generateLogger(MyClass.class.getClassLoader().getResource("log_messages.properties"));
    public void doSomething() {
        logger.info(Optional.empty(), "MyClass.doSomething");
        try {
            .. do things // throw new RuntimeException("something");
        } catch (Exception e) {
            logger.error(Optional.empty(), "HANDLE_EXCEPTION", e);
        }
    }
}

我的测试代码..

@RunWith(MockitoJUnitRunner.class)
public class TestMyClass {
    @Mock
    private ILogger logger;
    @InjectMocks
    @Spy
    private MyClass myClass = new MyClass();
    @Before
    public void init() throws Exception {
        MockitoAnnotations.initMocks(this);
    }
    @Test
    public void testMyClass() throws Exception {
        try {
            myClass.doSomething();
        } catch (Exception e) {
            fail("Should not have thrown any exceptions");
        }
        Mockito.verify(logger, Mockito.times(1)).error(Optional.empty(), "HANDLE_EXCEPTION", "Contains something specific");
    }
}

这是我收到的错误..

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: 
Invalid use of argument matchers!
3 matchers expected, 1 recorded:
This exception may occur if matchers are combined with raw values:
    //incorrect:
    someMethod(anyObject(), "raw String");
When using matchers, all arguments have to be provided by matchers.
For example:
    //correct:
    someMethod(anyObject(), eq("String by matcher"));

尝试过如下操作，但出现相同的错误：

ArgumentCaptor<String> argument = ArgumentCaptor.forClass(String.class);
Mockito.verify(logger, Mockito.times(1)).error(Optional.empty(), "HANDLE_EXCEPTION", argument.capture());

Answer 1

error在验证该方法被调用期间的所有参数都需要logger在您的情况下matchers。下面是一个使用 matchers 和模拟某些服务类的示例：

@ExtendWith(MockitoExtension.class)
public class SomeTestClass {
    private static class MyService {
        public void error(Optional<String> op, String msg1, String msg2) {
        }
    }
    @Test
    void testMethod() {
        MyService myService = Mockito.mock(MyService.class);
        myService.error(Optional.empty(), "This is error", "Some error appeared");
        Mockito.verify(myService, Mockito.times(1)).error(Mockito.any(), Mockito.eq("This is error"), Mockito.contains("error"));
    }
}

这里Mockito.any()、Mockito.eq()、Mockito.contains()是返回匹配器的方法。

若要断言该方法是使用包含给定子字符串的String调用的Mockito.contains()请使用匹配器。在这里，您可以找到有关使用匹配器的更多信息。